TT 1:120 Scale 4th Radius Curve Stencil or Alignment Tool Pack of 3 Tried and tested, and has the perfect slots to secure your track with screws or pins, they also have two handles on the spacers to secure the spacer and track with ease. Can work with both Hornby and Peco TT 1:120 scale. Printed in PLA. Track or building not included only for application purpose. Please message me for any other 3D printing ideas for the TT railway!